Lead Flashing and Valleys

Al Hamdan Consulting Office Doc. No. FM:QC:12

QUALITY CONTROL CHECKLIST Rev. 0

ROOF COVER Date: July 30, 2011

Project: Project No: Date: Name: Sign: Description: Sign: Stage Section D Comments Activity a Contractor Consultant Details of Inspection t e General Correct Material Correct Fixings, length , diameter & grade Check Sarking Material in main areas & at eaves Check Tile Batten Material/Impregnation

of 6 Batten Gauge Minimum Batten Sizes: Natural Slates-50mm x 25mm for up to 600mm span Manmade Slates-38mm x 5mm-up to 450mm span Manmade Slates- 50mm x 25mm for 450-600mm max span Double Lap tiles-38mm x 25mm-up to 600mm span Single Lap Tiles-38mm x 25mm-up to 450mm span Single Lap Tiles-50mm x 25mm for 450- 600mm max span Staggered joints in battens – in. length 1.2 m Project: Project No: Date: Name: Sign: Description: Sign: Stage Section D Comments Activity a Contractor Consultant Details of Inspection t e Weatherings Flashings/Lead Valleys/Stepped Chimneys Lead Slates Located Prior to Commencement Position of Lightning Tapes Check lead valley construction Al Hamdan Consulting Office Doc. No. FM:QC:12

Check tile width at verges, hips & valleys Fire barrier requirement between battens? Slate Roofs Position of fixing holes in Slates-check formed and regularity Min two fixings per slate Slate Size/Thickness/Type Larger slates at verges, hips & valleys Hip Details Valley Details and Widths Mix Pallets and Grade (Thicker to Eaves) Correct Overhang to Gutter Fire Barriers Between Battens Vapour Barrier

of 6 Project: Project No: Date: Name: Sign: Description: Sign: Stage Section D Comments Activity a Contractor Consultant Details of Inspection t e Check Special Fittings Slate Debris Build up Against Lay Boards etc. Ensure no debris left on underlay before or during tiling, (using modern felts- allows water ingress). Lead Flashing and Valleys Code 3 lead-1.32 thick for soakers-max length 1m Code 4 lead-1.80 thick for flashings-max length 1.5m Code 5 lead-2.24 thick for sflashings- max length 1.5m

Lead Valleys Lead fully supported by boards or sheets Minimum board width 225mm each side of centre line (wider for long roofs). Triangular fillets 150mm each side of centre line Clear space between slates/tiles 125mm minimum (wider for large roofs) Lead extends beyond fillets and should Al Hamdan Consulting Office Doc. No. FM:QC:12

have a welted edge Project: Project No: Date: Name: Sign: Description: Sign: Stage Section D Comments Activity a Contractor Consultant Details of Inspection t e Lead lapped along length of valley and fixed only at the top edge only with 2no rows of fixings Natural slates should be laid dry to each side of valley Tiles normally bedded in 50mm mortar laid on a debonding material a 20mm gap should be maintained behind the

of 6 mortar Tiles and slates should not be cut in position Tiles should be individually bedded up the valley slope